database-migration

问题 I've already exported data from an Oracle 11g instance as insert statements. They need to go into a MySQL 5.5 instance. Having trouble with the TIMESTAMP conversion; I know I can use the TO_TIMESTAMP function inline with INSERT statements in MySQL; however, am unsure as to the correct flags to use. As follows below, in linear order, is: the Oracle timestamp statement and my attempt at a MySQL compatible statement. Obviously it's not working (in that MySQL states there's a syntax error).

问题 Context: I have my ASP.NET MVC4 solution deployed in Azure. My MSSQL Server Database is also there, in Azure. I currently deploy this way: In web.config I change the connection string from local database (sdf) to azure database ( connectionString="Server=tcp:.....database.windows.net, ..." ) Right click on project name (visual studio), and then "Publish" So, my question is : How do I use the Update-database command in the Package Manager Console? Is it this way? Same step #1 from above Run

问题 I am testing a room migration and on the "migration and validation" step I got an java.lang.IllegalStateException: Migration failed. due to a wrong primaryKeyPosition value on the "service_id" column. Digging a little bit deeper I noticed that on the Expected side the attributes in the actual_visit_id_service_id_primary_key have different pk indexes (1, 2), while on the Found side, both have the same (1, 1) I checked into the database schema of table actual_visit_service in the installed app

问题 I am testing a room migration and on the "migration and validation" step I got an java.lang.IllegalStateException: Migration failed. due to a wrong primaryKeyPosition value on the "service_id" column. Digging a little bit deeper I noticed that on the Expected side the attributes in the actual_visit_id_service_id_primary_key have different pk indexes (1, 2), while on the Found side, both have the same (1, 1) I checked into the database schema of table actual_visit_service in the installed app

问题 I am testing a room migration and on the "migration and validation" step I got an java.lang.IllegalStateException: Migration failed. due to a wrong primaryKeyPosition value on the "service_id" column. Digging a little bit deeper I noticed that on the Expected side the attributes in the actual_visit_id_service_id_primary_key have different pk indexes (1, 2), while on the Found side, both have the same (1, 1) I checked into the database schema of table actual_visit_service in the installed app

问题 I am testing a room migration and on the "migration and validation" step I got an java.lang.IllegalStateException: Migration failed. due to a wrong primaryKeyPosition value on the "service_id" column. Digging a little bit deeper I noticed that on the Expected side the attributes in the actual_visit_id_service_id_primary_key have different pk indexes (1, 2), while on the Found side, both have the same (1, 1) I checked into the database schema of table actual_visit_service in the installed app

问题 I am testing a room migration and on the "migration and validation" step I got an java.lang.IllegalStateException: Migration failed. due to a wrong primaryKeyPosition value on the "service_id" column. Digging a little bit deeper I noticed that on the Expected side the attributes in the actual_visit_id_service_id_primary_key have different pk indexes (1, 2), while on the Found side, both have the same (1, 1) I checked into the database schema of table actual_visit_service in the installed app

问题 I need to change the type of a field in one of my Django models from CharField to ForeignKey . The fields are already populated with data, so I was wondering what is the best or right way to do this. Can I just update the field type and migrate, or are there any possible 'gotchas' to be aware of? N.B : I just use vanilla Django management operations ( makemigrations and migrate ), not South. 回答1: This is likely a case where you want to do a multi-stage migration. My recommendation for this

来源： https://stackoverflow.com/questions/37368917/database-schema-update-in-production

来源： https://stackoverflow.com/questions/37368917/database-schema-update-in-production